INTRODUCTORY ESSAY. 47 often obscure, so that a number of the genera described by Loureiro have not yet been identified, while others, not being recognized, have been described as new, and re-named by sub- sequent botanists. We must refer to the Introduction of Wight and Arnott' for full details regarding the illustrious series of botanists*, commencing with Konig and ending with Wallich, who in- vestigated with so much success the-botany of continental India. The volumes of the ' Asiatic Researches/ and of most of the systematic works of the end of the last and beginning of the present century, afford ample proof of the value of their labours; but none of them brought their materials to- gether in the form of a flora, except Roxburgh, whose f Flora Indica* however remained in manuscript for some years after his death, in 1815. Two-editions of it have been published since that period; one, which is incomplete, was edited by Drs. Carey and Wallich; it extends to the end of Pentandria Monogynm, but contains in any additional plants not con- tained in Roxburgh's manuscript, and requires therefore oc- casionally to be quoted; the other, which is an exact reprint of the manuscript as left by its author/ is in three volumes, and was published in 1832. Besides editing this portion of the f Flora Indica' of t)r. Roxburgh, Dr. Wallich commenced, in India, an illustrated work on Nipal plants, -which was the first specimen of iithor graphy ever produced in that country; and after his return to England, he published a series of 296 plates of plants in the' Plantae Asiaticse Rariores/ a work which, with the equally valuable Coromandel plants'of Dr. Roxburgh, in three folio yolumes, with three'hundred coloured plates, forms the prin- cipal contribution of the Indian Government to the illustwu tion of botanical science. The eastern or Malayan Peninsula of India was unknown botanically till it was visited by Jack, whose descriptions of * Jones, Fleming, Hunter, Anderson, Berry, John, Koxbmgli, Heyne, Klein, Buchanan Hamilton, Russell, Koton, Shutcr, Goran, Finlnysoii.